Automatic weft replenishing device



June 16, 1936. J. P. CAMPS AUTOMATIC WEFT REPLENISHING DEVICE 2sheets-sheet 1 Filed Sept. 3, 1952 June 15, 1936. CAMPS 2,044,206;

AUTOMAI-IC WEIFT REYLENISHING DEVICE Filed Sept. 5, 1932 2 Sheets-Sheet2 v Patented June 16, 1936 iJNi'EEQ STATES Zfittitt rarest assistApplication September 3, 1932, Serial No. 631,630

In Switzerland June 21, 1932 2 Claims.

This invention relates to an automatic weft replenishing device forlooms for weaving of the type in which the weft carrier is in the formof a rotary drum such as the Northrop type of rotary drum.

According to the present improvements, the automtic weft replenishingdevice is characterized in that the drum which carries the weft carriersor bobbins is made to advance, for the purpose of ensuring that theflyers, which guide the bobbins, remain parallel to the lateral sides ofthe shuttle, from the commencement of the transfer, until the end of itsmovement which is synchronous with the horizontal component of thehammer, thus producing a completely vertical change or straight movementof weft carriers or bobbins from the drum to the shuttle. The circularpath of the end of the hammer during transfer movement is such that thechange can be effected during an advancing movement of 18 to 25 mms., ormore, of the sley of the loom. In addition to the movement of the drumduring the transfer, a movement is given to the drum to place the nextsucceeding weft carrier or bobbin under the transfer hammer ready forthe next transfer.

The attached drawings form an integral part of this specification, andshow by way of example, a convenient embodiment of the invention.

Figure 1 is a side view of the device.

Figure 2 is a front view of the same, partly in section.

A drum l3 provided with radial flyers [9 has a toothed ring M withoutwardly projecting notch-shaped teeth and a toothed ring 3 withinwardly projecting ratchet teeth. One end of a pawl 4 engages the ring3, the other end of this pawl being pivotally mounted on a stud I8 fixedin a lug lb on a rocking lever mounted on a spindle 8 by means of asecond lug m. A hammer l in the form of an elbow lever and comprisingtwo arms la and lb is oscillatable around a spindle Ill and normallymaintained in raised or inoperative position by a spring 20. The arm I?)of this elbow lever is also mounted on the spindle 8. A lever 9 ispivotally mounted on the spindle 8 and has at its end a catch head 2|which is resiliently maintained in engagement with the toothed ring M bymeans of a spring 2. The lever 7 also carries a tappet roller 5 adaptedto bear against the under side of the lever 9 and press the catch head2! in engagement with the toothed ring it. A pin l I is fixed on thelever I and engages in the forked end of a lever l2 mounted on a spindleI5. A catch I1 is provided on the end of the lever l, which catchengages a stop It fixed on the slay of the loom.

The device operates in the following manner:-

When it is desired to transfer a bobbin from the drum l3, the spindle I5is rocked in any suitable manner. This movement is imparted by the leverl2 and pin II to the rocking lever l, which consequently swings intohorizontal position so that the roller 5 bears against the under side ofthe lever 9 and presses the catch head tightly into engagement with thering N, thereby locking the drum against rotation. During this movementthe pawl l mounted on the stud I8 is advanced over the toothed ring 3.When the lever l is in horizontal position, its catch H is in the pathof movement of the stop It fixed on the slay and this stop engages inthe catch l'l when the slay has still 18 to 25 mms. to travel beforereaching the end of the beat up movement. Consequently the lever isdisplaced 18 to 25 mms. by the slay. Owing to this displacement thespindle 8 is also displaced causing the hammer to swing about itsspindle l0 and press the bobbin out of the flyer l9 into the slay.

As the lever 9 is also mounted on the spindle 8, it will likewise bedisplaced and its catch head 2i will rotate the drum l3 so that thebobbin is gradually brought into the delivering position during thetransfer so that a straight movement of the bobbin from the drum to theshuttle takes place during the transfer.

When the slay commences its return movement, the lever l is liberatedand parts are returned into their initial positions by the spring 20.The lever I is then swung downwards by means of the lever l2 and spindlel5 so that the roller 5 is removed from the underside of the lever 9,thereby releasing the lever so that it is held in engagement with thering M merely by its spring 2. Owing to this downward movement of thelever l a pull is exerted on the pawl 4 which consequently rotates thedrum. During this rotation the catch head slides into the next followinggap in the ring l4 against the action of the spring 2.

What I claim is:-

1. An automatic weft replenishing device comprising in combination withthe slay of the loom, a stop on said slay, a spindle adapted to berotated to bring the device into action, a forked lever keyed on saidspindle, a rocking lever carrying a roller engaging in the forked end ofsaid lever and having a catch at its end adapted to be brought intohorizontal position in front of said stop, a drum over said slayprovided with radial flyers, an internally toothed rim on said drum, apawl engaging said rim and cooperating with said rocking lever to rotatesaid drum at the end of the movement of said slay after said stop hasengaged said catch, a spring loaded lever adapted to engage in said rimto lock said drum during the replenishing action, a roller on saidrocking lever adapted to hold said spring loaded lever in engagementwith said rim when said rocking lever is in horizontal position and ahammer pivotally mounted on said rocking lever adapted to shifthorizontally during the transfer to produce a straight movement of thebobbin from the drum to the shuttle.

2. An automatic weft replenishing device, as set forth in claim 1,characterized in that, in the application of the automatic weftreplenishment to the Northrop type of rotary drum, means are provided toeffect the change compatible with a very long travel of the sley of theloom, whereby in addition to the movement of the drum during thetransfer a movement is given to the drum to place the next succeedingweft carrier or bobbin under the transfer hammer ready for the nexttransfer.

JUAN PICANOL CAMPS.

